Press mold for glass articles



Patented July 27, 1926.

UNITED sins-s GEORGE E. ZEIIEER, F PITTSBURGH, PENNSYLVANIAt PRESS MOLD FOR GLASS ARTICLES.

Application filed April 6, 1922. Serial No. 550,003.

The invention relates to press molds and it has particular relation to molds for formng hol ow glassarticles provided with necked-in handles or ,knobs formed inte- -grally I therewith.

- One of the objectsof-the inventionis to the character described, adapted for use in conprovide a mold, of that is particularly .nection, with the manufacture of hollow glass articles, such as covers forglass dishes,

lamp shades and'the like, which is so constructed that no unsightly seams will appear on the main body portion of the article and in which all necessary seams will 1 be disposed inrelatively inconspicuous locationswhere they will notdetractfrom the ap earance of the article.

Xnother object of the invention is to pro- .vide a mold'of'the character described having a single mem er adapted toform a seamless body portion of an article and a separate, collapsible portion for forming a necked-in kn b or handle therefor whlch' will be automatically disengaged from the I mold. v a 7 Another object ofthe invention is vide a mold of the classset forth, which embodies a supplementary portion which not only oo-operates with the main portion of the mold in formmg an article but which also functions to-raise the article from the mold at the completion of the molding oper- .ation.'. I

A furtherobject of the invention is to pro- \,vide a mold of the character described which comprises relatively few parts, is easily operated and which maybe manufactured at relatively small expense. A With such-objects in view, as well as other advantages which may beincident to the utilization of the improvements, the invention consists, in the parts and combinations thereof hereinafter set forth and claimed,

with the understanding that the several necessary elements constituting the same may be varied in proportion and arrangement without departing from the nature and-scope of the invention. 7 0 In order to make the invention more'easily :understood, means are shown in,;theaccompanying drawings, for carrying the same into practical efiect, without limiting the improvements in their v useful application, to the Particular gonstructionawhich handle when the article is raised from theto proslots 6 within which two cooperating memfor' the purpose of explanation, are made the subject of illustration.

In the' accompanying drawings:

. Figure 1 is a vertical sectionalview of a mold embodying'the invention and, illustrating the parts in the positions that they occupyat the completion of the pressing operation.

Fi 2 is a view similar to Fig. 1 butfshowing t e molded article partially lifted from the mold.

vFig. 3' is a side elevational view of the collapsible member of the mold which forms the necked-in knob portion of a glass article.- I

Fig. 4 is an enlarged vertical sectional view of another form of the invention in which the mold is adapted to form glass articles such as lamp shades progided with a supporting bead or marie. I

Referring to the drawings, a mold embodying the invention is shown as coinprising a main body: member '1 of substantially cup-shape and a vertically. reciprocable co.- acting plunger 2. The lower portion of the body member of the .mold is provided with an integral cylindrical housing 3. The bottom of the body portion l of the mold is provided with an axial aperture formed with an inclined wall 4 and which communicates with the interior of the housing 3.

A vertically reciprocable plunger 5 is slidably mounted within the housing 3 and. is provided with two diametrically disposed hers 7 are pivotally mounted by means of pins 8, which pass through the plunger 5. The members 7 are formed with complementary recesses 9 and together constitute the two halves of a divided' mold for form ing a necked-in handle or knob 10 ofa glass article 11. The plunger 5 may be. provided with a centrally disposed recess or depression 12, such as that shown in Fig. 1, if desired, to further add to the ornamental eonfiguration of theknob 10.

The upper extremities of the members 7 are provided with cam surfaces 13 which engage the bevelled wall 4 of the aperture in the mold,,when the plunger 5 occupies its lowermost position, and are thereby maintained in their operative molding positions. The members 7 are also provided. with cam surfaces 14 adjacent to their lower extremities, 'which engage the loweredge of the" to elevate the formed article from the mold and cause the members 7 to be moved about their respective pivots 8, to disengage them from the necked-in knob '10 of the article, to permit of its withdrawal from the mold.

A press rin l5 surrounds the plunger 2 and is forme with a depending annular flange 16 which is adapted to engage a recess or seat 17 formed adjacent to the upper edge of'the b dy member 1 and co-operates therewith to entirely close the mold. The flange 16 may be provided with a groove 18 which is engaged by the plastic glass when it is displaced by the downward movement or the (plunger 2, and imparts thereto the desire configuration or finish.

In Fig. 4, there is shown another form of the invention in which the mold is proportioned to form lamp shades. In this particular construction, the members 7 are spaced farther apart and are each provided with complementary arcuate grooves or depressions 19 which co-operate with each other to form an annular bead or marie 20 adjacent to the upper portion of a shade 21. The plunger 5 is provided with a flat, centrally disposed surface-22' which co-a'cts with the members 7 to closeithe bottom of the mold. e i The various arts are so: proportioned that at the comp etion of the molding operation the shade is formed with a'portion 23 which is connected to the marie 20 by a very thin wall 24. This ortion may be easily broken off to form t e openiimg'at the top of the shade and the rough edge. caused by the fracture, smoothed finishing operation.

From the foregoing it will be ap arent that by the present invention a very egicicnt mold is provided which considerably simplifies the manufacture of glass articles and in which all necessary seams occur in relatively inconspicuous locations.

Having thus described my invention, what 1 claim is:

1. A mold comprising a member for forming the body portion of an article and a collapsible member movable with respect thereto for forming a necked-in extension on said body portion and for raising said article from said mold.

2. A mold comprising a main .body portion and a supplementary collapsible portion adapted to form an extension on an article and to raise the article out of engagement with said body portion.

3. A mold comprising a main-body portion of hollow construction having an axial opening therein and a supplementary coloil' by any suitable" .levers pivotally mounted subscribed lapsible portion movably mounted in said opening for co-operation with said body portion.

4. A mold comprising a main body portion of hollow construction having an axially disposed openin therein and a sup )lemental-y divided mol d movably mounte in said opening and adapted to co-operate with said body portion to form an extension on an article and to lift the article from said body portion at the completion of the mold- .ing operation.

movably mounted in'said opening, a plurality of members havingfcomplementary reccsses therein, movably mounted on said plunger and co-operating with said body portion to form an extension on a molded article having a restricted connecting ortion, and means for moving said mem rs out of engagement with sald extension to permit of the withdrawal of the molded article from the -inold.

7. A mold comprising a body portion adapted to receive a gather of plastic glass and having an axial opening in the bottom thereof, the wall of said opening being inclined to form a cam surface, a plunger movably mounted in said opening, a plurality of on said plunger and havin co lementary recesses formed therein arfaptdd to co-operate with each other-to form a divided mold adapted to' iorm a necked-in projection on the molded article, said levers being further provided with cam surfaces adjacent to each end thereof adapted to engages the inclined wall of said opening to maintain said levers in them from the necked-in projection of t molded article to permit of the withdrawal thereof from the mold upon the completion operative moldlng position and to disengagee of the molding operation.

In testimony whereof; I have hereunto my name this 25th day of March,

GEO. E. ZE LEB. 

